Clutch mechanism.



G. 0. LEOPOLD.

CLUTCH MECHANISM.

APPuATlQN FILED 11m11.191s.

Patented June 20, 1916.

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Patented June 20 2 SHEETS-SHEET 2.

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GEORGE o. LEOPOLD, or PHILADELPHIA, PENNSYLVANIA, AssIGNoR "ro NoRTI-I Bnos.

MFG- C0., OF PHILADELPHIA, PENNSYLVANIA, A

VANIA.

CORPORATION 0F PENNSYL- GLUTCI-I MECHANISM.

Specification of Letters Patent.

Patented J une 20, 1916.

To all whom t may concern Be it known that I, GEORGE O. LEOPOLD, a j

citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Clutch Mechanism, of which the following is a specification.

One object of my invention is to improve Y inclosing the 'clutch mechanism being shown` in section and the pawl spring being removed; Fig. 2 is a section on the line a-a, Fig. l; Fig. 3 is a sectional plan view on the line o o, Fig. 2; Fig. 4 is a sectional view on the line 0 0, Fig. 2; Fig. 5 is a detached perspective view of the pawl carrier; Fig. 6 is a longitudinal sectional view of the carrier; Fig. 7 is a sectional view on the line Z-Z, Fig. 6; Fig. 8 is a detached perspective view ofthe pawl; Fig. 9 is a detached perspective view of the pawl spring;

Fig. 10 is a detached side view, partly in section, of the lower pinion; Fig. l1 is a detached side view, partly in section, of the upper pinion; Figs. 12, 13 and 14, are longitudinal sections showing the pawl shifted to different positions; and Fig. 15 is a section on the line c c, Fig. 12.

Referring to the drawings, 1 and 2 are bearings forming part of the frame of a drill press in the present instance.

3 is a spindle splined throughout its length and secured to the pawl carrier 4 by a key 5 adapted to a slot 5a in said carrier so that while the spindle must turn with the carrier it can .slide longitudinally therein.

6 and 7 are two beveled pinions, the pinion 6 being greater in diameter than the pinion 7. The pinion 6 meshes with a large bevel gear wheel 8 and the pinion 7 engages with a small bevel gear wheel 9, shown in dotted lines Fig. 1. In the present instances, these two gears 8 and 9 are made,

as shown in F igs. l0 and 11. Each wheel has a hub bushing which is driven in the wheel and the projecting portion 11 of the hub bushing of the wheel 6 has a series of teeth 12 thereonand the projecting portion 14 of the wheel 7 Vhas a series of teeth 15 thereon. These wheels aremounted loosely on the spindle 3 between the bearings 1 and 2 and the` projecting portions 11 and 14 of the wheels extend into the pawl carrier 4, as clearly shown in Fig. 2. A pawl 13 is mounted in a recess 18 and has fingers 16 at one end adapted to engage the teeth 12 of the wheel G and fingers 17 at the opposite end adapted to engage the teeth 15 of the wheel 7. The construction of the pawl is clearly shown in Fig. 8. When the lingers are in engagement they lock the carrier to the pinion. By cutting the carrier away, as at 18, a platform 19 is formed on which the pawl 13 is mounted. Transverse slots 2O are cut in the carrier forming depressed portions 21 at each end of the platform-19. rllhe pawl has projecting ribs 22 at the back which rest on the table when the pawl is in the central position, but, when it is drawn down, one 'of these ribs drops onto the ,def pressed portion 21, tilting the pawl and causing the lingers 16 to engage the hub 11, locking the pinion 6 to the carrier. At the same time, the fingers 17 are withdrawn clear of the projections on the hub 14 of the pinion 7 so that the carrier and the spindle will be driven through the pinion 6. When thepawl is forced up one of the ribs 22 drops into the upper depression 21, causing the pawl to tip in the opposite directions, the fingers 17 engaging the projectionsl on the hub 14 of the pinion 7, and the linger 16 being withdrawn from engagement with the hub 11. The carrier is thus locked to the pinion 7 and will be driven through said pinion. Back of the pawl is a spring 23, which is perforated for the passage of the knob 24 which extends through a slot in the shell 25 in position to be engaged by the fingers of the operator. The shell extends between the pinions, as shown in Figs. 1 and 2, and protects the pawl and the spring. Thus it will be seen that I provide an exceedingly substantial pawl which is bodily shifted either into engagement with one pinion or the other, or which can be shifted to a central position clear of both pinions. The mechanism can be economically manufactured and it is not liable to get out of order. The pawl iits snugly in the slot 18 so that the -side walls of the slot resist any pressure upon the pawls and the pawls are only subjected to a crushing action. They can oe made so heavy as to resist this action. By having the two fingers on the pawl engaging a projection on the hub, the hub is locked to the carrier in either direction. By cutting the walls of the projections on radial lines and-beveling the edges of the iingers, the lingers extend to the rootsof the teeth.

I claim z l. The combination in clutch mechanism, of a carrier/gspindle, said-carrier bein-g' slotted; a pawl mounted in the slot and having fingers `ateachv end; a table-on the carrier,` the. pawl being arrangedf to slide on the table; two hubs, each having-j` projections thereon, one arrangedlto be engagedV by the'fingers on one end of the pawl and the otherbei-ng arranged tobe engaged loy-V the iingersfon the other endfof the pawl; and a spring bearingupon thepawl.

2. The combination in clutch mechanismj of a carrier; a spindle; two pinions,4 one atone end of the carrier and the other at the opposite end thereof, eachkv pinion havinga hub with projections thereon, the carrier having a longitudinal slot therein and'forming -a centrall table and havingA depressed portions at eacliend, ofthetable; -a pawl having fingers ateach-end; two ribs atthe backpoflthe pawflarran-ged'to slide on thetable and so positioned inrespect to f the depressions thatwhen moved to its extreme positions in either direction, one ofltheribs will drop into a depression and'tilt the pawl,

throwingit into engagement with one hub and moving it out of engagement with the other hub. y

3. The combination in a drilling machine, obearings; a spindle mountedin the bearings; a carrier arranged to turn the spindie, said carrier having a longitudinal slot therein` forming a central table at the base of the slot and having two transverse slots therein deeper than the longitudinal slot forming depressed portions at each end of the table; two pinions, each`v having-aribbed hub projecting into the :ends ofthe-carrier; a pawlhav-ing--fingers at each end and two ribs at'the back spacedkapart so that when the pa-wl'is inthe cen-trai` position both ribs will restv upon the table and tliefii-n-gers of the pawls will be--out of-engagement with the hubsof4 both pinions, but-when the pawl is moved into eitheroi itsextreme positions, one of, the ribs will drop into the depression, tilting the p'awl and throwing it into engagement `with the ribs on one'hub1 so that the' carrier` will be -loclred to thev said-hub through the pinion', the pinionhaving: a projection; av spring *back` of the pawl; 'ands a shell' inclosingfy the carrier,4 pinion and spring.

4./ A pawlriora lclutch mechanism consisting of a` plate havingtw'o fingersv at-each end and two'r-ibsatthe backl thereof; and-having a central lproj ectionby-whch itis shifted.

5. A1 Vpawllfor` aVv clutchy mechanism consistingofa sheet metalplate; two integral fin-gers at each end arranged-1 atJ an angle with respect-toth`e body ofiitheplaterand havingtwo transverseribs at the back pressed fromthe pl'ate at theAjoint-between the lingers 'and7 the body'ofj the pawl.

" GEORGE 0.l LEOPOLD.

opieaofth patent magi be obtainedfor we cents each, by-=acd1gesa1ngthe.Commissioner:ai:Patents.` Washington, 11.0. i 

